Hose coupling



MSNM

HOSE COUPLING Filed 1360.21, v1920 anmm'rmfz mi PH S CHA ,g1/Row assisesUpon one of the levers 18 is pivoted a paWl 2O which is tensionally heldin mesh with teeth 2l by means ofv spring 2Q. The teeth are arranged ona boss 23 which is integral with the member 2. The said boss is alsoprovided with linger 28 which engages with a. stop 24 fixed to the crankwhen the said cranlris in position forreleasingl the coupling members.Adjacent the front end of the lower cam surface l5 is provided a raisedportion or undulation 25 which serves as a means for lifting the femalemember from' its seat upon the gasket to separate the coupling.

In p actice the tube portion of my cou-v plingr having; been secured tosections of a tube it is simply necessary to insert the male into thefemale member and move the lever to eng-age the lug ll with the canisurface. The first action of the lower cam upon the lug will cause it toride over the rise 25 and a continued movement of the lever 18 towardthe hose ellccts a. union of the couline' br the action of the n3 er camsur- P is .y

face to draw the male member rmly upon the gasket. To eliminate thepossibility of the lever 18 being accidentally moved it is locked whenthe coupling,r is united by means of the pawl which engages a suitablylocated notch. lVhen it is desirable to divide the cous pling the pawlis released from the notch andthe lever 18 lifted thereby causing thecam surfaces to move until the lugs pass over the undulation 25, atwhich point the members are forced apart. The saidl cam surfaces aremade of sufi'cient lengths to accommodate a variety of thicknesses ofgaskets.

ln couplings of the character to which this invention relatesconsiderable difliculty has been encountered during cold weather atwhich time the low temperature causes the conducted water to freezeeither between the united members or about the coupling upon which waterhas been splashed or otherwise deposited. This is particularly true whenthe members are used as a head coupling, that is when one member isattached directly to the hydrantI and subject to the reception ofexternally deposited water forni a leaky connection. Couplings asheretofore constructed required the expenditure of a great amount oflabor to effect their separation which often resulted in daiu- .age tothe members oi' hose and obviously consumed a great deal of time. .lt isalso true that couplings employed on oil lines oi lines conducting hightemperature fluids are subject to the same disadvantage inasmuch as inthe case of oil or other viscous fluida film of oil becomes lodgedlbetween the gaskets and securely unites them or in the case ofa hightemperature fluid the gaskets become adherent and are dillicult to part.

The present invention provides means to overcome the diflicultyjnparting the united members and the preferred meansof acconiplishing,`this result with aininimum amount of manual labor, consists in theprovision of the raised portion 25 of thc cam surface l5 which acts as awedge upon-the completion of a movement ot the lever armslS to re leasethe male and female members of the ccupline. i

Although a practical embodiment of my invention is illustrated anddescribed it is to be understood that other modifications may be madewithout departing from the spirit and. scope of the invention as setforth in the appended claims.

What is claimed isl l. A hose coupling comprising male and femalemembers, levers pivoted at opposite sides of the female member lugsintegral with theinale member,- cam surfaces upon one of the arms of thelevers and arranged to engage with the lugs of the male member, anundulation at the exposed end of one of the said surfaces for thepurpose of lifting the male member subequent to the movement of the canifor releasing the said members.

2. A hose coupling comprising male and female members, levers pivoted atopposite sides of the female member, upper and lower cam surfacesdisposed upon the levers, lugs disposed at opposite sides of thc malenicmer and arranged to engage with the cam surfaces and means comprisinga pawl and a toothed segment whereby the said cam surfaces inay beretained in a given relation with the said lugs. y

3. A hose coupling comprising male and female members, lugs oppositelydisposed at opposite lsides of the male member, bellcrank membersdisposed at opposite sides ofthe female member, cam surfaces arrangedupon the short-arm of the said crank adapted to engage with the saidlugs, a toothed mem secured to the female member, a pawl pivoted uponthe long-aim of the crank whereby` the said bell-crank may be locked.1in a given position by means of the engage-v ment of the said pawl withthe teclli of the said segnient.

ln testimony whereof I have hereunto set my hand.

RALPH SCHAWROW.

